Drilling-machine



(No Model.) 2 Sheets-Sheet 1.

A. P. SIBLEY & G. O. WARE. DRILLING MACHINE.

No. 462,884. Patented Nov. 10, 1891.

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(No Model.) 2 Sheets-Sheet 2.

A. P. SIBLEY 8v G. O. WARE. DRILLING MACHINE.

No. 462,884. Patented Nov. 10, 1891.

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@,513 HZOLMM 4 UNITED STATES PATENT OEEICE.

ALBERT P. SIBLEY AND GEORGE O. VARE, OF SOUTH BEND, INDIANA.

MACHINE.

SPECIFICATION forming part of Letters Patent No. 462,884, dated November 10, 1891.

Application filed August-3, 1891. Serial No. 401,486. (No model.)

T0 all whom it may concern:

Be it known that we, ALBERT I. SIBLEY and GEORGE O. VARE, citizens of the United States, residing at South Bend. in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure l represents a side elevation of our improved drilling-machine complete, Fig. 2, a plan view of the driving and back gear devices; Fig. 3, a detail vertical sectional view of a portion of the feeding mechanism; and Fig. ha horizontal sectional view of the worin, showing clearly the friction device.

This invention has relation 'to that class of vertical drilling-machines wherein the tool may be automatically and forcibly fed to an adjustable horizontal table and quickly returned therefrom, the vertical spindle carrying the tool being journaled in an upper stationary head and a lower movable head, the latter head sliding on ways on the post and having its vertical movements imparted to it by suitable mechanism; and the invention consists in certain novel features of construction and combinations of parts that willfully hereinafter appear, and be particularly pointed out in the claims.

Referring to the drawings by letters, a designates the vertical post of the machine, which is mounted upon a suitable base and supports upon its lower cylindrical portion a table b, having the usual adjustments. The driving cone-pulleys c c are secured, as usual, upon horizontal shafts journaled in bearings upon the main frame, the pulley c heilig located near the base of the machine Vand the other one being mounted on a shaft c, journaled in bearings c2 c2 at the upper end of the machine. The shaft c of the upper cone has secured on its extreme inner end (which only projects a shortdistance beyond its inner bearing c2) one section of a clutch c", and on the shaft between the clutch and said bearing is secured a pinion of. On the frame in axial alignment with the shaft c is another shaft d, which is journaled in bearings (Z3 (Z3, and has its inner end terminating near to the inner end of said shaft c, this inner end of shaft Cl having mounted on it with a spline and groove the other section of clutch c", this latter section being adapted to rotate with the shaft, but having a sliding motion thereon, so that it may be readily engaged with or disengaged from its adjacent rigid section. This shaft d has secured to it about midway its length, between its bearings, a large gearwheel cl2, and at its outer end it is provided with the usual bevel-pinion d', meshing with the usual spindle-driving bevel-gear f. A supplemental rod or shaft e is secured in arms on the main frame parallel with the shaft cl, and mounted on this rod is a sleeve e', having a limited movement thereon between the supporting-arms. On one end of the sleeve e is secured a large spur-wheel adapted to mesh with the pinion c4, and on its other end is secured apinion c2, adapted7 when properly adjusted, to mesh with the spurwheel (Z2. A lever c is pivoted on the frame between these shafts d and e", one of its ends being connected to the sliding section of the clutch and its other end to the sliding sleeve e', whereby a lateral movement of the said lever will canse the sliding clutch-section and the sleeve to simultaneously move in opposite directions. y

lVhen speed is required and it is desired to drive the shaft d directly from the conepulley shaft c, the forward end of the lever is adjusted to the left, whereupon the back gears c2 es will be thrown out of gear with the gears d2 and ci, and the clutch-section on the shaft (Z will be thrown into positive engagement with the rigid section on the adjacent end of the cone-pulley shaft, as shown in Fig. 2. In this way the spindle may be driven directly from the cone-shaft. Then it is desired to drive the shaft (Z through the medium of the back gears, the lever is thrown in the opposite direction, whereupon the clutches are disengaged and the back gears are thrown into engagement with their respective gears on the shafts CZ c, as shown in Fig. l. In this way a very slow motion of the. tool, but great power, is obtained.

The advantages of mounting the drivingcone rigidly on a separate shaft and arranging the back gears as described are important. Where the gears or cones are loose on the shafts, they not only require constant oiling, but they invariably work loose, and also ICC out their shafts; but our arrangement obviates these difficulties and provides mechanism that is very positive and powerful in operation, that may be readily adjusted Without loss of time, and which will not require lubrication and will not work loose and cut the shafts.

The spindle f passes loosely down through the gearf, mounted on the stationary head a', and is secured thereto by a spline and groove, the lower end of the spindle passing through and journaled in the sliding head a.

v that this shaft may move vertically in uniengage the'gear j and cause it to rotate with.

son with the head and spindle. A small bevel-pinion g3 is secured on the lower end of shaft 'g and meshes with a bevel-gear j, journaled loosely on the end of the horizontal shaft of the Worm 7c, said worm-shaft being journaled in bearings formed on an armjg, projecting from one side of the head, the worm itself beingalmost entirely inolosed by a tubular casingj, formed on the armjg. A depressionfor pocket t7'2 is formed in the Vtubularcasing j for Vthe reception of the lubricant for the worm and its bearings. The worm-shaft has secured to its forward end a hand-wheel k, by which it may be rotated when desired. -A rod or bolt 7c passes longitudinally through the worm-shaft, and is providedat its for-ward end with a turning button k3 and at its rear end with the usual 'beveled friction-disk 10', adapted to frictionally vthe worm-shaft, the friction device lbeing controlled, as usual, by the button 7a3 in front.V

A'horizontal shaft h is journaled in bearings in the sliding head and has frmed integrallywi'th lits inner end a pinion 71,', constamt-ly engaging the rack a4 on the post. This shaft is arranged above and at right angles to the screw k, and has mounted on its projecting portion a Worin-gear 7L, which is securedon the shaft by a spline and groove, so as'to Vrotate with it, but have a limited endwise movement independently of it. This Worm-gear has formed integrally with its outer face a tubular hub h3, which projects out beyond theend of the shaft h and has its end closed by a cap h5. A radial lever 1l is pivoted in a slot in one side of the chambered hub Aand has its inner end terminatingtherein and pivotally secured between ears i, rigidly secured on end of the shaft h. This lever is 'employed to slide the worm-gear on its shaft and engage it with or disengage Vit from the worm, as the eXigenoies may requiro. To facilitate its engagement with and disengagement from the worm, the inner ends of the teeth on the periphery of the Wormgear are formed straight, as at h4, instead of curved, as in the usual worm and gear devices.

`lIn operation motion is imparted to the shaft gl from the spindle, and from thence it is imparted to the screw through the medium of the gears g3 j, from whence it is communicated to the Worm-gear and its shaft and pinion. In this manner the head is slowly and forcibly fed toward the table, the degree of motion and power being regulated by the several cone-pulleys and back gears. By

friction device the lautomatic feed will be stopped and the sliding 'head may bereadily adjusted vertically vby means of the handwheel 7c on the wor1n-shaft,as is evident,and by disengaging the worm-gear fromvthe worm the shaft h may be readily rotated byusing the lever c' in the manner'of a crank, thereby enabling the head to be rapidly adjusted toward and from the work Without loosening the friction devices. The advantage ofthese feeding .devices is obvious. In using the self-feed-that is, in releasing thehead'from the feeding devices and allowing it to feed itself by gravity--the operator doesnot have to loosen the frictiondevices, but simply has to disengage theworin-gear by vva slight endwise movement thereof. This is-also so when the operator desires to rapidly raiseo'r lower crank for rotating the shaft '71.

The'oil'cup or pocketj2 serves `to lubricate the parts where the most friction occurs, and the cap on the end vof 'the hollow tube serves to keep out dust and dirt. The Ypinion h being `formed integral with its shaft vand the worm-gear being firmly fitted on .the shaft andthe shafts themselves Vbein g j ournaled in solid stationary bearings make these parts very strong and durable vwhere the most strength is required. Disengaging the Wormgear from the Worm by an end wise movement of the former is advantageous over the usual way of disengaging them, in that the centers of the shafts are not changed in the least.

It is evident that our feeding mechanism may be asreadily used on those'drillswhere the lower head is stationary and the spindle is secured in a vertically-adj ustable quill sliding in the head and provided with a racksuch, for instanceras shown in the ,patent of A. P. Sibley, No. 412,677, dated October'S, 1889, the pinion hin this case meshing with the rack on the quill, insteadof a rack on thevpost, as Shown.

Having thus fully described our invention, what We claim as new, and desire to-secure by Letters Patent, is

' l. In a drilling-machine, the combination of a frame, a drill-spindle, two independent shafts journaled on the frame and having turning the button k3 and disengaging thev the headfthe levert' serving asa convenient IOR IIO

their inner ends in close proximity to each other, the inner end of one shaft being provided with a sliding clutch-section and the adjacent end of the other shaft with a stationary section, a pinion and driving-pulley on one of the shafts and a spur-wheel on the other, a supplemental shaft parallel with the other shafts, endWise-movable gears on this shaft adapted to engage with the aforesaid gears, and means for adjusting the sliding clutch-section and movable gears, substantially as described.

2. The combination, in a drilling-machine, of a frame and spindle, two independent horizontal shafts journaled on the frame, means for locking the shafts together, a spur-wheel secured rigidly on one of the shafts, a pinion and a pulley secured rigidly on the other, and movable back gears adapted to be engaged and disengaged with the gears on the said shafts, substantially as described.

In a drilling-machine, the combination of a frame, a post carrying a rack, a sliding head on the post carrying a drill spindle, a shaft h, journaled in the head and having formed integral with it a pinion meshing with the rack 0n the post, a movable worm-gear on the said shaft 7i., a worm meshing with the Worm-gear and journaled on the sliding head, and means for driving the worm, substantially as described.

4. In a drilling-machine, the combination of a frame, a head supported on the frame, a drill-spindle supported by the head, a horizontal shaft journaled in the head and provided with pinion on its inner end, an endwise-adjustable worm-gear on the outer end of this shaft, anda screw jou rnaled on the head and meshing with the worm-gear, substantially as described.

5. In a drilling-machine, the combination of a drill-spindle and means for feeding it, consisting of a rack, a shaft and pinion engaging said rack, an endwise-sliding Wormgear on this shaft and adapted to rotate therewith, a lever for adjusting and rotating this worm-gear, a worm engaging said Worm-gear, and means for driving the worm, substantially as described.

6. The combination of a stationary worm, an end wise-movable worm-gear adapted to be engaged with said worm, the inner ends of the teeth of said worm being formed straight, as at h4, substantially as described.V

7. In a drilling-n1achine, the combination of a frame, a sliding head carrying a spindle, a horizontal shaft for feeding said spindle and head, said shaft having keyed on its projecting end a sliding Worin-gear, this Worm-gear being provided with a chambered hub, a cap secured over the end of this chambered hub, thereby inclsing the end of the shaft, a lever pivoted in a slot in the chambered hub and engaging theinclosed end of the shaft, a screw, and means for driving the screw, substantially as described. l

S. The combination of a worm -gear and screw and means for driving said screw, a casing partially inclosing the screw, said casing having an oil pocket 0r depression formed in it under the screw, substantially as described.

In testimony whereof we afiix our signatures in presence of two Witnesses.

ALBERT P. SIBLEY. GEORGE O. XVARE.

Xlfitnesses:

H. A. ROLLINs, M. B. HrcKoX. 

